/Objective-C-Delegate-Swift

Register Objective-C delegate method from Swift Project.

Objective-C Delegate in Swift

Register Objective-C notification protocal in Swift Project.

If you want achieve objective-c delegate in to swift. You need to do following steps.

  1. Need to create bridge file to import your objective-c classes

     //
 //  Use this file to import your target's public headers that you would like to expose to Swift.
 //

 #import "UVIViewController.h"

  2. You need to extend the protocol name in your swift viewcontroller

     import UIKit

 class ViewController: UVIViewController, UVIDataRefreshProtocol {   // 2. Extend Protocal
     
     var secondController: DelegateViewController?

     @IBOutlet var delegateRefresh: UILabel!
     
     override func viewDidLoad() {
         super.viewDidLoad()
         // Do any additional setup after loading the view, typically from a nib.

         self.registerForBasicDataRefreshNotification();             //  3. Register the protocol notification
     }

     override func didReceiveMemoryWarning() {
         super.didReceiveMemoryWarning()
         // Dispose of any resources that can be recreated.
     }
     
     // Register the protocol notification with same name. Example : DataRefreshNotification
     override func registerForBasicDataRefreshNotification() {
     
         self.validateBasicDataRefreshNotification();
         NSNotificationCenter.defaultCenter().addObserver(        // 4. Register the protocol notification with same name.
             self,
             selector: "basicDataDidRefresh",
             name: DataRefreshNotification,
             object: nil)
     
     }
     
     override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
         delegateRefresh.text = "";
         if segue.identifier == "view_to_delegate" {
             secondController = segue.destinationViewController as? DelegateViewController
         }
     }
     
     // Basic Data Did Refresh Notification
     func basicDataDidRefresh() {                            //  4. Event will be triggered while calling the protocol post notification. called with same name
             NSLog("\n Basic data is refreshed")
             delegateRefresh.text = "Basic data is refreshed";
     }

 }

    5. NSNotificationCenter.defaultCenter().postNotificationName(DataRefreshNotification, object: nil)  // Call the notification.

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Created by Vignesh

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